In 1798, a stuffed platypus specimen was delivered tothe British Museum. Reports that it laid eggs createdmuch confusion. To modern biologists, a platypus isclearly a mammal. It has fur and the females producemilk. Young animals have typical mammalian teeth thatare replaced by hardened pads of the “bill” as the animalmatures. Why do you think modern biologists can moreeasily accept that a mammal can have some reptileliketraits than scientists who were considering this animal inthe late 1700s?
Animal Diversity
Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.
Platyhelminthes
Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
In 1798, a stuffed platypus specimen was delivered to
the British Museum. Reports that it laid eggs created
much confusion. To modern biologists, a platypus is
clearly a mammal. It has fur and the females produce
milk. Young animals have typical mammalian teeth that
are replaced by hardened pads of the “bill” as the animal
matures. Why do you think modern biologists can more
easily accept that a mammal can have some reptilelike
traits than scientists who were considering this animal in
the late 1700s?
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